Apparatus for automatically connecting up the subscribers of telephone-exchanges.



J'. PET CKi. APPARATUS FOR AUTOMATIGALLY CONNECTING UP THE SUBSGRIBERS0F TELEPHONE EXCHANGES.

APPLIOATION TILED MAR. 7, 1905.

Patentd Dec.17,191 2.

WWW

. Jar? /Ycj.

' liar/ vy J. PBTIGK APPARATUS FOR AUTOMATICALLY CONNECTING UP THE$UBSORIBERS 0P TELEPHONE EXCHANGES.

APPLICATION TILED MAR. 7', 1905.

Patented Dec. 17,1912.

1o sums-sum. 2.

v I J, PETI-GKY, APPARATUS I'OR AUTOMATIGALLYUONNEGTING UP THESUBSCRIBERS 0F TELEPHONE EXCHANGES.

1 APPLICATION IILED HA3. '7, 1905.

- Pat ned'Dec.17,1912.

10 SHEETS-SHEET 3.

v I J PETICKY. APPARATUS FOR AUTOMATICALLY CONNEGTING UP THE SUBSGRIBERS0P TELEPHONE EXCHANGES.

.APPLIOATION FILED MAR. 7, 1 905.

Patented Dec.17,1912.

10 SKBETS-SHBET 4.

Iiifiiiillllllllllllllllt liar/ 6V J. PETIUKY. APPARATUS FORAUTOMATICALLY CONNECTING UP THE SUBSGRIBERS OF TELEPHONE EXCHANGES. v

APPLICATION FILED MAR. 7. 1905. 1,047,833, Patented D60. 17, 1912.

10 SHEETS-SHEBT 5.

A JM/ E172 v J PETIGKY. APPARATUS FOR AUTOMATICALLY CONNECTING UP THESUBSORIBERS OF TELEPHONE EXGHA NG-ES.

. APPLICATION TILED MAR. 7, 1905 1,047,833. Patented Dec. 17,1912.

10 SHEETS-SHEET 6 iZ/ary: 7 m\m J. PETIGKY. APPARATUS FOR AUTOMATICALLYGONNEGTING UP THE SUBSGRIBEES 0E TELEPHONE EXCHANGES.

APPLICATION rum) MAR. 7, 1905.

Patnted Dec. 17,1912.

10 SHEETFSHEET 1.

, WWI/mm J. Pinei. APPARATUS FOR AUTOMATIGA LLY CONNECTING UP THESUBSGRIBERS 0P TELEPHONE EXCHANGES.

APPLICATION FILED MAR. '7, 1905.

Patented Dec. 17, 1912.

10 SHEETS-SHEET B.

v Q I J. PETICKY. APPARATUS FOR AUTOMATICALLY OONNECTING UP THESUBSGRIBERS OF TELEPHONE EXCHANGES.

APPLICATION FILED MAR. 7, 1905.

A Patented Dec. 17,1912.

10 SHEETS-SHEET 9.

NM MM 3N J. PETIGKY. v I APPARATUS FOR AUTOMATIC-ALLY CONNECTING UP THESUBSGRIBERS 0F TELEPHONE EXCHANGES.

APPLICATION FILED MAE. '7, 1905.

Patented D60. 17, 1912.

10 SHEETS-SHEET l0.

/0Jf7 R QM mg llr fimmar WWW UNITED STATES PATENT OFFICE.

JOSEF PETICKX OF PRAGUE, AUSTRIA-HUNGARY.

APPARATUS FOR AUTOMATICALLY CONNECTING UP TH E SUBSCRIBERS OFTELEPHONE-EXCHANGES.

Specification of Letters Patent.

Application filed March 7, 1905. Serial No. 248,834,.

Patented Dec. 17,1912

To all whom it may concern: Be itknown that I, Josnr PiirroKi'r, asubject of the Emperor of Austria-Hungary, and resident of Prague,Austria-Hungary, have invented certain new and useful Apparatus forAutomatically Connecting up the Subscribers of Telephone-Exchanges, ofwhich the following is a specification.

This invention automatically connecting up the subscribers in telephoneexchanges.

Said means consist of apparatus for each subscriber, or each calloflice, and connect ing-up apparatus in theexchange. For each subscriberthere are two call apparatuses, one fitted alongside his telephone andone fitted in the exchange, so there are altogether as many sets of callapparatus as there are subscribers or call stations, while p andbreaking of which sixth connecting-up the number of connecting-upapparatuses in the exchange is determined by the largest number ofconversations estimated to be likely to be carriedon simultaneously.

The subscribers call apparatus serves for determining and makingparticular contacts for the electric current, through the making in theexchange certam movements of the relative apparatus in the exchange--and of the connecting-up apparatus-are brought about. With the help ofany one of the call apparatus in the exchange,' connection can be madewith any one of the connecting-up/apparatus, and thus any twosubscribers can be connected up. As, however, different connections havecontinually to be made, and the connectingup apparatuses are engagedtherefore intermittently, the call apparatus in the exchange is designedto automatically discover a disengaged connecting-up apparachange callapparatus makes connection;

with the eleventh connecting-up apparatus; but if in the meantime, forexample, the apparatus is set-free, then the next or twelfth connectionwould be made through thisdisengaged sixth appara tus. The connecting-upapparatus discovers automatically the required subscrib'e'rs line by hisnumber and makes the'desired con has reference to means for accompanyingdrawings,

ments of the installation in a different nection'. Each one of the threeapparatuses s designed to automatically return to its normal ordisengaged position on the conclusion of a conversation, so that newconnections can be made. The construction of the apparatus employed mayvary. I have illustrated in detail and'dlagrammatically one form in thein which? Figures 1"to 6 show one form of subscribers call apparatus:

view, Fig. 3 a front view, with the front of the case in which theapparatus is housed removed, Fig. 4 a vertical section, and Figs. 5, 6and 7 show the means for putting. this apparatus into and out ofoperation, 'Fig. 5 being a side view, Fig. 6 a front view, and

Fig. 1 being a backview of the contact plate, Fig. 2 a front Fig. 7being a diagrammatic view partially in section of a portion of themechanism shown in Figs. 5 and 6. Fig. 8 is a side view of a portion ofthe selecting mechanism; Fig. 9 is atop plan view of the mechanism shownin Fig. 8. Figs. 10 and 11 are end views in detail of portions of themechanism shown in Figs. 8 and 9; Figs.

12, 13, 14, 15, 16, 17, 1s, 19, 20, 21, 22 and 24,

are views in detail of the rotating selecting wheels, contacts, andconnecting mechanisms, shown in variops positions in diagram, and Figs.23, 25 and 26 showthe entire station installation as the same appearswhen viewed from various points, while Fig. 27 is a fragmentary viewshowing eleoperative position. Figs. 28 and 29 show diagrammatically thevarious circuitwires and connections. a

This subscribers call apparatus consists of operating mechanism 1, onthe spindle 2 of which an arm 3 is secured which carries on its endthree spring cont-acts 4, 5 and 6 which slide over a fixed plate 7, madeof insulating material and this arm 3 is actuated at theproper momentbya spring or other suitable motor of any desired form, which it has notbeen deemed necessary to show herein. contacts are let in, whichcontact-s are arranged in particular groups.

Commencing from the normal or" disengaged. position of the arm 3, shown1n Fig. 1, and following the direction of movement of the latter, thefirst contact group, of, for example fifteen to twenty contacts, isindi- In this plate, a number of cated by the numeral 8, which groupserves to actuate the relative call apparatus in the exchange so as todiscover a disengaged connecting-up apparatus. Then follow four contactgroups, 9, 10, 11, 12 each comprising eleven contacts, of which alwaysthe first 9, 10, 11, 12, serves .to actuate the contactdevice A,herelnafter described, of the connecting-up apparatus (Fig. 23), whilethe other ten contacts 9, 10, 11, 12 serve toactuate the contact devicesB, G, D and E of said connecting-up apparatus, that is to say, formaking the connections with the number called. Then there are twocontacts 13 by means of which the contact device A is displaced twoteeth. In the other half-circle of this plate, a contact 14 is disposedwhich serves to make the connection for speaking; then there follow fourcontact groups 15, 16, 17 18, each comprising twelve contacts, of whichthose marked 15 16, 17, 18, serveto bring about the movement of thecontact device A, while the others 15, 16, 17, 18, serve to actuate thecontact devices B, G, D, E. Then follow two contacts 19 for displacingthe contact device A; behind these two contacts 19 a special contact maybe provided whereby direct connection with the exchange may beestablished. The last contact in the circle, 20, serves to permanentlyconnectthe subscriber with the exchange for the purpose of receivingcalls from other subscribers.

The contacts 4 and 5, which are connected together, 10, 11, 12,

12, 13, 15, 15, 16*, 16, 17, 17, 18, 18, and

19, and the contact 6 slides over i the contacts 14 and 20, and theelectric current is conducted to these contacts by known means fromrings and lamellae fixed on the spindle 2. The contacts referred to, 9,10, 11, 12, through which the contact devices B, C, D and E are actuatedin discovering the number of the subscriber called, may be covered asrequired by means of insulated shields 21, 22, 23, 24, whereby adisplacement of the contact devices B. C. D. E. by as many teeth asthere are free, i. e. uncovered, contacts remaining may be accomplished.In a similar manner, the contacts -15, 16, 17. 18, through which thecontact devices B. C. D. E. are operated to bring them back to theirnormal or disengaged positions, may be covered by insulated shields 25,26, 27, 28, which latter are so coupled in pairs by means of therotatable arms 29 mounted on the axis of the apparatus that byuncovering a predetermined number of contacts in the groups 9, 10, 11,12, a like number of contacts in the groups 15,16,17,18 will be covered,the result of which is that the contact devices B. C. D. E. which havebeen displaced or moved to correspond with a particular number, will beturned relatively to the number of teeth remaining between that positionslide over the contacts 8, 9, 9, 10,

and'the normal or disengaged position, z'. e. to the end.

From' the arms 29, hand levers 30 provided with springs project thesubscribers apparatus and on this front cover a numbered index (Fig. 2)with groups of figures from 0 to 9 is applied, of which the first on theleft is for thousands, the second for hundreds, thethird for tens, andthe fourth for units, so that any number from 0 to 9999 can be made up.

If the apparatus is to be designed for a larger number of subscribersthan 10,000, an extra contact is provided in the group 9, whereby thetotal will be increased by 1000; in the connecting-up apparatuscorresponding alterations will bemade.

By placing the hand levers 30 on various figures of the index, theshields 21, 22, 23, 24, take up such a position that they always uncoverone more contact than the hand lever indicates on the index, becausethere-is also a contact for the 0. If for example the subscribers number2458 is to be called, the hand levers will be moved to the correspondingfigures on the index, whereby three contacts in group 9, five contactsin group 10, six contacts in group 11,- and nine contacts in group 12will be uncovered, the result of which will be that the contact device Bwill be moved three teeth, the contact device C five teeth, the contactdevice D six teeth and the contact device E nine teeth. Simultaneously,a like number of contacts in the groups 15, 16, 17, 18 will be covered,so that in the order named 8, 6, 5, and 2 free contacts remain, by meansof which the contact devices B. C. D. and E. will be moved back intotheir normal or zero position.

In the drawings 0 has a particularcontact position, so that when anumber having a 0 in it is called up the relative apparatus movesforward one tooth on setting the hand lever 30 on the relative 0. Thisarrangement may however be dispensed with and instead of it the contactdevices may normally stand on 0, so that when a number.

with a 0 in it is called, no movement of the contact device isnecessary.

The arm 3 is held in the zero position by through the front cfmeans ofthe adjustable stop 31; if this stop be moved by pressing in its spindle32 said arm 3 will be set free and will rotate in the direction of thearrow 33, through an angle of 180, whereby the connection with thesubscriber called up will be made and the arm will be brought to a standby means of a special stop device. This stop device consists of thelever 34 (Figs. 5, 6 and 7) which is rotatable on the bolt 35 andcarries a double stop which comprises an upper tooth 36 and a lowertooth 37 the latter of which is disposed sidewise. When the arm 3reaches this tooth 36 (position 3) it is held thereby and the apparatusthereby stopped.

If, however, the lever 34 be moved in the dil rection of the r a littlefarther, and will the tooth 37. 1f the lever34 be moved in 5 thedirection of the arrow 39, the arm 3 will be set free and will continueto move inthat direction. These two movements of the lever 34 areattained by the aid of the lever 41, which is provided with an arm 40and is mounted loosely on the same spindle, which lever 41 carries thethree usual contacts and on which the receiver is hung. If the receiveris'removed for the purpose of speaking, the lever 34 is moved (Figs. '5and 7') so that the arm 3 can move a little farther, While, when theconversation is finished, the receiver is again hung up, the saidlever34, turns in the reverse direction, so that the .arm 3 is again setfree and in its further progress makes the necessary contacts forbringing back the whole of the apparatus to its zero position, until,finally, it is brought to a standstill by the stop 31.

The exchange apparatus, which is shown in Fig. 8 in front view and inFig. 9 in plan view, comprises a contact device and a lever mechanism.The contact device comprises the ratchet wheel 42, in which a pawl 43engages, which latter is moved by an electro-magnet 44 and thus turnsthe ratchet wheel. On the spindle of the wheel 42, a disk 45 this diskthere is a row of five contacts 46 which slide over a fixed contact disk47. In this there are fifteen to twenty contact rows 48, 49, 50, 51,etc., their number beingaccording to the number of the connecting-upapparatuses, that is there are as many contact rows as there areconnecting-up apparatuses in the exchange. The number of these contactrows corresponds to the number of contacts 8 in the subscribers callapparatus.

The electric current is conducted to the movable contacts 46 by meansotlamellae and; rings as in the case of the subscribers call-apparatus.On the lower end of the double'armed lever which. rotates the ratchetwheel 42 thereis a cont-act 52 which makes contact with the fixedcontact. when this lever is attracted by the electro magnet.

he lever mechanism of the exchange apparatus, of which Figs. 8, 9 and 10show a front, plan, and side view respectively, and Fig. 11 shows afront view'at the moment of its operation, comprises a lever 54, whichis actuated by an electro-magnet 53 and on the upper end of Which thereare five contacts 55, 56, 57,58 and 59, while its lower end is. providedwith a contact 60. Opposite the two highest contacts 55, 56, there is asecond movpble lever 61 with two contacts 62, 63. opposite the threemiddle contacts 57, 58 and 59.; is a fixed bracket 64 with threecontacts 65, 1

then be stopped by arrow 39, the arm 3 moves (F 68, while the 'of thewhole loose on the levers 54 and 7 whereby any backward movementwhatever provided with contacts is fixed. On p 7 6. When the lever Whenthe lever 54 is at rest 1g. a connection is made between the contacts56, 63, and the'lower contacts 60, contacts 55, 57, 58 and 59- are outof contact with the contacts 62, 65, 66, 67, and thus until aftersetting. in operation apparatus, a disengaged connecting-up apparatushas been connected. When the lever 54 is attracted by the electro-magnet53, the four remaining upper contacts 55, 517, 58 and 59, make contactwith the contacts 62, 65, tacts 56 and 60 leave the contacts 63 and 68.At this moment both levers 54 and 61 fixed contact 68.

are retained by means of a lever 69 which isprovided with two stopswhich lever 69 lies '61 when at rest,

of the lever 61 is prevented, while'a slight movement of the lever 54 ispermitted after shutting ofi' the current in the electro-magnet 53 sothat then both levers --54 and 61 remain in the position shown in Fig.11. In this position the upper contacts 55, 62, and 56, 63, and thelower contacts 60 and 68 are out of contact while tacts 57, 58 and 59are in contact with 65, 66, and 67. When thereafter the electrolnagnet-70 attracts the lever 69, both levers 54 and 61 are returned to theiroriginal or zero position.

The exchange apparatus described serves as already stated, fordiscovering disengaged connecting-up apparatus which is accomcomprises alever 71 which is actuated by an electro-magnet '74, and is providedwith two contacts 75 and 76 at its upper and one contact 77 at its lowerend Opposite the middle contact 76 there'is a second niovable' lever'72,which isprovidedlwith a countercontact78; opposite the upper contact 75on the lever 73 is a counter-contact- 7 9 and opposite the contact 77 afixed counter-contact 80. The contact 7 5' is coupled with the contact71 is attracted by the electro-magnet 74, the lever 72-moves, the undercontactlis broken, the lever 73 springs in and holds the lever 72 bymeans of its stops, while the lever 71 moves back a little after thecurrent is shut ofl in the electro-magnet 74 until coiitactis again madebetween the contacts 7 5 and 7 9. When the lever 7 3 is drawn to theelect-ro-rnagnet'81- both levers 71 and 72 move back and contact isagain made between the contacts 77 and 80.

The contact 79 connecting-up apparatus is, as shown diae1, 64., and eaon the lever 73 of the first 66, 67, while the -congrammatically in Fig.29, connected with the-contact 75 of the second apparatus, the

-. contact 7 9 of the second apparatus with the 13 23 in plan view,

The connecting-up apparatus, which is shown in Figs. 14-27 consists offive con-' tact devices A. B. C. and E. and a predetermined number ofcontact rods 82. The

contact device A. (shown in detail in Figs. 20 to 22) serves forbringing about the movements of the contact devices B. C. D. and E. andof the contact rods 82, and that in such a. manner that it connects upthe current to the relative electro-magnets. This contact device A.comprises a fixed disk 83, shown in Fig. 21 in a view from below and inFig.

and a movable disk or sector 84, shown in plan in Fig. 22, which isdisposed below said fixed disk and is pro .'ded with ten contacts 85, ofwhich always two neighboring contacts are coupled in pairs andalternately make the connection e tween the contacts in the upper disk.These consist of the contact groups 86, 87, 88 and 89 for the actuationof the electromagnets contact devices B. C. D. and E. 'n selecting thenumber of the. subscriber called up, of contact groups 94, 95, 96 and 97for the actuation of the same electro-magnets for moving the contactdevices into their zero position, further, of two contacts 98 and 99 belonging to the contacts 8689 already referred to, of the contact 100 formaking the connection for speaking, of the contact 101 for connecting upthe current to the electromagnet 81 or 70 for the purpose of return--ing the lever mechanism of the exchange call apparatus and of theconnecting-up ap paratus to its zero position, 102 and 103 formoving-the rod 82 for making the connection for speaking and forreturning the same when the conversation is finished, and finally of twocontacts 106 and 107 which come into operation when a subscriber isalready engaged when someone else wishes to speak with him, these lastmentioned contacts serving also to prevent any other subscriberoverhearing the conversation being carried on. For the purpose of makingdirectconnection with the exchange, an extra contact maybe provided onthe disk 83. The various contacts referred to in the disk 83 arearranged in several quadrants or sectors and the like operating contactsin the several-quadrants are connected up with each other. To each ofthe contact groups described belong contact rings 108, 109, 110, 111 and112. The disk 84 is moved by the electro-magnet 113 by means of aratchet wheel 114 and a lever, on

which latter a contact 115 is fixed which on the actuation of theelectro-magnet makes the connection between the contacts 116.

The other contact devices B. C. D. and E.

90, 91, 92 and=93 for rotating thevice C is provided with contacts ofthe contacts serve for selecting the number of the subscriber called up,the contact device B. serving for thousands (or higher), C. forhundreds, D for tens, and E for units. Eachof these contact devicesconsists of a disk 117,

or 118, 1,19, 120 in which a-certain-number of contacts are let in, andof a movable disk or sector 121, or 122, 123, 124mounted below said diskand provided with contact groups of four contacts each, of which eachtwo neighborin contacts are'connected up in pairs and make alternatelythe connection with the contacts in the fixed disk. Each movable disk ismoved or rotated by means of a lever actuated by the electro-magnets- 30the contact device B. from the electro-magnet 90, C from 91, D from 92and E from 93.

The fixed disk 120 of the contact device E, which is shown in Fig. 15ina view from below and in Fig. 23 in plan view, carries one hundredcontacts 125, which are arranged in groups of ten, and ten contacts 126,of which each one belongs to one of the groups 125 and is connected upwith the former by means of movable contacts 127 (Fig. 25).

In addition, a like number of similarly arranged contacts 128 and 129are carried by the disk 120 and contacts 130,by the movable disk.similarl to E, the contact deand 132 and contacts 133, 134 and 135. Inaddition, this device has two contacts 136 and 137 which are connectedup with thezero contacts 130 and 133 of the first group.

The contact device D carries two groups 138 of eleven cont-acts each andthe contact ring 139, which are connected up by movable contacts of anysuitable sort, (not shown), and a like number of similarly arrangedcontacts 141, 142 and 143. The contact device B is furnished withcontacts arranged n a simi lar manner to thoseon D and carries thecontacts 144, 145 and 146, and the contacts 147, 148 and 149. Thecontacts 128'on the contact device E,and the contacts ohQ-O of the firstconnecting-up apparatus are progressively connected up with the likecontacts of the second, third, fourth, etc., connecting-up apparatus.

The contact rods (Figs. 23, 26 and 27) serve for the actual connectingup of the subscribers for conversing. Each of these rods is slidablyarranged in a fixed frame 150 and carries one hundred contacts 151 towhich the wires of the individual subscribers are connected and which bymeans of the relative contacts make the connections with all theconnecting-up apparatuses, so that, accordingly, the number of hundredsof subscribers to the exchange represents the number of contact rods ofthe connectingup apparatus. Forexample, for3000 subscribers 30 rods arenecessary. To each of these contact rods. belong electro-magnets 104 and105. Under each contact rod there are one hundred fixed contacts 152,which a'contactrod is in its zero "there is no contact'between I and152, but when the current is connected are connected u with'each otherin such a manner that, ibr example,'the first fixed contact 152 of thefirst rod 1s connected up with the hundred-and-first contact of thesecond rod, then with'the two-hundred-and up to the electro-magnet 104,the rod is displaced so that it makes simultaneously one'hundred'contacts between 151 and 152,'in

which position the rod is retained by means of the hook 153 until saidhook'is raised by' means of the 'electro-magnet 105.

the electro-magnets 104 connect 1 v Onleach contact rod aconnection-contact 1-54 is arranged o posit/ea counter-contact 155 fixedon the. rame. The contacts 152 (Figs. 23 and 28) are connected up inorder with the contacts 125 on the contact device E, and the contacts126, which belongto the whole group of ten last contacts, are connectedup in order'with the single contacts 138 of the contact device D. Inlike manner, with the contacts 130 on the contact device C and thecontacts 131, which belong'to the whole contact group 130, make theconnections-in order-with the single contact 144 on the contact deviceB. This connection is'shown in Fig. 23. The contact 138 corresponding to0 on the contact device D is connectedup with the contact 126 whichpertains to the first of thecontact groups 125, 2 e. from 0 to 9 on thecontact device E and controlled thereby, the contact-138 in the secondrow corresponding tounits on the contact device D is connected ;upwith'the contact '126 of the second-contact group 2'. e. fromlO to 19,and

so on. Accordingly the sixth in the row, the

corresponding contact 138 to the number 5, is connected up with thatcontact 126 which belongs to the sixth contact group, i. e. from 50 to59. Thereby the contact 125 corresponding to the number 8on' the contactdevice E, isconnected up afterthe disk l24 is rotated which contact isin group, from the sixth 50 to 59. This corresponds to the fifty-eighthcontact on the contact device Band on allthe contact rods (Fig. 23).-

A like arrangement is made in the case of the contact devices B and G.Take for example the third contact 144 'on the contact device B whichcorresponds to the number p two which'is connected up with that contactwhich belongs to the third contact group 130 i. e. from 20 to'29. 'Bythis the contact on the contact device C corresponding to the number 4comes into operation on the.

fot'ation of the disk 122, which'contact he 55 ongs to this third groupand which corre- (Fig."23) 1 When vfrom the battery 15 earth toground-(3r "that the word circuit will be closed by e contactdevice 0,the electro-magnet 104, and the twenty fourth contact rod. When thecircuit energizing the magnet ,104 is closed the twenty-fourth contactrod on which are'the contacts 2400 to 2499 as shown in Fig.- 26 'is slidso as to enable its fiftyeighth contactto make theconnectioncorrespending to the subscribers number 2458.

The whole of the apparatuses described are connected up with each otherin the manner shown diagrammatically in Figs. 28 and 29 with the resultthat they operate; as will now be described.

en a subscriber, for example wishes to places the pointer carlever 30 onthe relative call'up. No. 2458 he ried by the hand numbers on his index.As has been already described there will remain in the contact group 9three, in group '10 five, in group 11 six and in 'grou 12 nine .freecontacts; simultaneously a ike number of contacts in the groups 15,16,17 and 18,, are covered up so that, in order, eight, six,'five andtwo free contacts. remain. Thereupon the spindle 32 is pressed in,whereby the'sto 31 is displaced; this sets the arm 3 free whicconsequently moves in the direction of the arrow 33. By this movementthe contact 4 makes connection With the'first contact of the group 8whereby a circuit is established contact 56, contact 63, magnet'44,subscribers call ap aratus including contact 4, ground 0', t rough theand thence back to the battery 157. This circuit is shown by theconnecting wires being marked 156- and will be hereinafter referred toas the circuit 156,

slponds with the twenty-fourth contact, on t it being understood thatcertain parts of this circuit also -form vparts of other circuits so ashereinafter used referstbfthe complete route traversed by a current inperforming a specific operation.

Thereby the armature ofthe electric-magnet 44 is attracted and theratchet wheel 42 and the disk wheel 45 are rotated one tooth so 7 I thatthe contacts 46 on the next following contact row on the disk 47, forexam 7 make contact with the contacts 48. en these contacts are inconnection With'a disengaged connecting-up apparatus, the circuitthrough the connecting up apparatus, here inafter referred to generallyas the circuit 158 and indicated by that reference numeral on thedrawing is closed. The circuit 156 will simultaneously be broken asdescribed below. finding] a disengaged connecting-u apps. ratus will beunderstood from the diagrams matic representation of-the various connecThis automatic searching for and tions shown in Fig. 29, andhereinafterexplained. Presuming the first connecting-up apparatus to be disengagedthe circuit: 158

through circuit 156 andthe bringing tothe action of the currentgether ofthe contacts 52, which circuit 158origin'ates'in the current innecting-up a circuit 158 will which circuit had tromagnet 53, contacts46 and 48, electromagnet 74, and contacts 78 7 6 and 7 5. Theelectro-magnets 53'. and 74 attract and draw back their armatureswhereby contact isbroken between the contacts 56 and .63, so that onfurther movement of the arm 3 over the'contacts 8 the circuit 156 willbe broken,

I the wheel 45 thus remaining stationary and all further currents (fromthe contacts) act directly upon this disengaged connecting-up apparatus.apparatus is not free, 'L e. when t e contact 76 of this apparatus isnot in circuit, the not be closed, the current in actuated the armatureof the electro-magnet 53 and prevented the new circuit 156 being closed,but on the movement of the arm 3 over the second contact of oup 8, thecircuit 156 ,will again be closed. wheel 42 will bev and thereby theratchet rotated a further tooth. Now the contacts 49 which correspondwith the second connecting-up apparatus come into play.. If thisapparatus be freethe circuit 158 is closed (the path of the currentbeing shown in dot and dash lines in Fig. 29), the current in whichcirculates from the battery 157 through the contacts 52,-electro-magnet53, contacts 46 and 49- of the exchange apparatus, elect-ro-magnet-74.and contacts 78 .7 6 and 75-of this second connecting-"up apparatusand contacts 79 and 75 of the first conapparatus. Thereby the artheelectro-magnet 53 of the exand that of the electro-' magnet 74 of thesecond connecting-up apparatus' will be actuated, whereby connectionbetween the contacts belonging thereto 56 and 63 will be broken so thatthe further passage of current in the circuit 156 and mature 0 changeapparatus rotation of the wheel 45 will be stopped. In

this manner it can be seen that those of the subsequent connecting-upapparatuses are free or disengaged the lever mechanism of which is inits zero posltion or the contacts 76 and 78 of which are in touch. p

- When "a disengaged connecting-up apparatiis has thus'been found andthe arma turesof., the electro-magnets 53 and 74 have been actuated,thelever 5.4'takes up the position shown in. Fig. 11 so that continuoustouchbetween the contacts 57, 58 and 59, and 65, 66 and 67 is maintainedWhen therefore the cont-act 4 in the subscribers apparatus is broughtover the contact 9, a circuithereafter called 159 is closed, the currentin which circuit circulates from the battery 157 through theelectro-magnet 113, in connection wi h the contact device A, contacts 49and 46, contacts 58 and 66, contacts 9, contact 4 on the arm 3 ground G,ground G and back to the battery. Therethe battery 157 If however thecon ecting-uptooth, this recurring .as often as there are thereupon thecontact oy the armature of the electro-magnet 113 will be actuated, thedisk of the contact device A will be rotated one tooth, and thecont-acts 86 will make the connections for the actuation of thecontactdevice B (161 Fig. 23). Thereuponthe contact 4 comes in contactwith the first, e. the'O contact of group 9, whereby a circuit hereafterknown as the circuit 173is closed, thecurrent in which circulates fromthe battery 157 over the contacts 108, 85, and 86, in the contactdeviceA, the electro-magnet 90, the

' contacts 98, and 109 in the contact. device A, the contacts 49. and'46 in the exchange appa. atus, the contacts 57 and 65, the relativecontact 9 onthe subscribers call apparatus,.the contact 4 ground G,ground G, and back to the battery. By the action of the current thearmature of the electro-magnet90 will be actuated, whereby the contactdevice B or its disk 121 will be rotated one tooth on to 0. Through thenext contact in group 9, the disk will be rotated another tooth on to 1.Through the further contacts the disk will be actuated each time by onefree contacts. in this group 9., accordingl when the disk has beenactuated three teeth it will indicate two thousand.- Thereupon thecircuit 159 is closed by the instrumentality of the contacts 10, thecurrent actuating anew the contact device A so that it is moved a secondtooth (162 Fig. 23), whereby the connection. of the contact device Cwith the electro-rnagnet 91 is made. When 5 reaches the first of thecontacts 10. the'circuit hereinafter called the circuit 174 andindicated by the numerals 174 is closed the current in which circulatesas in circuit 173 with the difier ence however thatit passes through thecontact 87 and electro-magnet 91, whereby the contact device 0 is movedone tooth on to 0.

Through, the next contacts 410 the contact device C is further. rotatedbeing moved as many teeth as there are uncovered contacts in the group10, accordingly, asv in the example already given, by five teeth, whichrepresents-four hundred. Then the contact 11 comes into operation andthrough it .the

circuit 159 is again closed so that the'contact device A is rota-ted'athird tooth (163 23), whereby the connection for the actuationf of thecontact device D is made. Whenthe contact 4 engages the first of thecontact group 11, the circuit hereinafter called the circuit .175 andindicated by the numera1's 175 fis closed, the current in which flowsalong the path taken by the current in the circuits 17 3 and 174, exceptthat it passes through the contact 88 and the electro-magnet 92; thecontact device D is rotated by as many teeth as there are uncoveredcontacts remaining in the'group 11, accordingly in the present instanceby six teeth. (Five 7' units. Thereupon described, contact afterexplained.

the subscriber called, is made.

3 comes against the tooth 36'and'is scribers call apparatus,

tens) .a pairof normally 4 are arranged to tro-magnet 105' I contactdevice A through the circuit 180 (or 181) Then the contact 12 comesinto. play for'the circuit 159, the contact device A is rotated a fourthtoot-b164, the circuit. hereinafter called the circuit 176, andindicated by numerals 176,-the current of which flows along the path.common to the circuits 173, 174, and 1 5, and through 89 and 93,

the contacts 12 so that the moved by as many teeth as there areuncovered contacts remaining in the group 12, accordingly in thisexample, by nine teeth, which corresponds to eight the contact 4 makescon-' tact with the first of the contact grou 13, the circuit 159 isclosed, the contact device 'A' is rotated a fifth tooth, 165, and closesthe circuit hereinafter called the circuit 177 and indicated by thenumerals 177,'the current inwhich circulates from thebattery throughclosed contacts 178, which be opened by an 'elect rocircuit hereinafter'to be magnet 179 in a v 147, contact 144, contact 131, contact 130,-already found (or in the I 25 case of a smaller; number the-nonehundred, through the contacts 136) to the contact de vices B and C, theelectro-magnet 104 which 1 corresponds with said contacts 130 (or 136),and the contact 102 and ring 111 in the contact device A and thence backto .the battery 157. The magnet 104 corresponding to the twenty-fourthcontact rod is energized and" the rod moved, the rod bearing'thecont-acts 2400 to 2499, whereby communication with the desiredsubscribers number is obtained. Simultaneously the hook' 153 .falls intothe tooth ofthe displaced contact-rod, so that the latter'isiretamedthereby until the elecraises the hook out of en-' gagement, This takes;place only on the conclusion of the conversation" as herein After 7 thisthe contact- .4 engages. the second contact 13,-whereby the is rotated asixth tooth, 166, and the connection 'for'speakingwith.

Thereuponthe arm held. The subscriber calling up signals The cur rentinthis circuit, commencing with earth,

flows through the telephone apparatus ofthe calling subscriber, by theswitch S, and passing successively. through the bell 6, con act 0,contact 0, fork f, and out to contacts 6, and 14, on said sub contacts57 and on the lever mechanism of the exchange apparatus,'contacts 46 and'49, contacts 109, and in the*contact device A, thecontacts 138 and 125corresponding to the par? ticular number on the contact devices-.1) andE and the connection in the contact rod 82.' Here the current flows overinto the 'app'aratusof the subscriber called (circuit 181,

the current entering 66 shown in Fig. 28 in dotted lines) through tooth37. Then conversation can, take place. j

-must be mad the contacts 60 of the lever mechanism of the exchangeapparatus, the contacts 20and 6 of the subscribers call apparatus (asthe arm 3 there stands in its zero position), the telephone and toearth. On the caller re,-

ceiving the reply signal from the subscriber called, both subscribersremove their receivers, whereby the arm 3 of the callers' call apparatusis set free and moves a little farther until it comes in contact withthe The circuit being that exterior to the subscribers tele hones over.which signaling took place, tlie instruments being brought into circuitby the removal of'the receiver 1', from its hook whereby the circuit isclosed through the contacts a? and c. v The current from thesubscriberscall apparatus-thus passes from contact 4, throughreceiver' r, secondaryof, the transformer T, switch S, to ground G. At the same timealocalcircuit is established from" the local battery', LB, throughtransmitter d, primary-of the transformer T, contact a, fork 1,contacts,

switch S, and arm ,199, thence to the bat- -tery LB.

Should another subscriber desire tocall, up the subscriberwho is alreadyengaged, the relative'contactrod in that 'connectmgthrough which theconnection e, cannot be actuated. This second caller'sets-his callapparatus onthe desired number; The relative exchange ap'-, paratusseeksout another connecting-up apparat us in which the contact devices B, C,D, and-E, rotate'similarly to the contact first connecting-up apparatus.

up apparatus,

devices in the =But thereby "another circuit '182 (or 183) i is closedthe, current in which originating in circuit'183 (shown in dot and dashlines in Fig. 28) from-the battery 1.57 flows from the secondconnecting-up apparatus through the electro-magnet 179,; contacts 106,85 and 112 in the contact device A, contacts 142, 143a-nd 141 in thecontact device D, contacts 129,130 and 128 in the contact device E, andafterward flows. over through. ;the,

of vthe innerf rings in the contact devices E and C of all te ioo ioa

instrumentality. of-the connection described between all the contactsconnecting-up apparatuses from the contact device 0- of this secondparatus into the relative and 128 ofthe contact'deviceE' of the first(engaged) connecting up apparatus, where the current (now as circuit infull line) flows through the contacts 141, 143 and 142 in thecontactdevice D,,con- .tacts 112, 85and 106 in the contactdevice A,contacts 148, 149 and 147 in the contact de- 1 .vice B, contacts 134,135. and 133 (o-r137) of the contactldevice C, to make theconnectionbetween the contact devices 0 of connecting-up apall theconnecting-up apparatuses back into" A the second connecting-upapparatus,-where contact 129, .130

v 126 183 indicated it again flows in circuit 181 (indicated by contactsthat the relative contact rod bearing the contact 94, '85 and 99.

contacts 240042499 does not move and the connection with the subscribercalled up is not made, whereby also it is rendered impossible foranothersubscriber to overhear the conversation between the twosubscribers who are connected up.v When, after the conversation isfinished, the calling-up subscriber hangs up his receiver, the lever 34takes up its original position whereby the arm 3 is set free and movesthrough its second half-circle. I

On the contact 5 engaging the contact 15"., the connection with thecircuit159 is reestablished and thecont-act device A is thereuponrotated one tooth more, the seventh .(167 Fig. 23). Hereby theconnection with the elect-ro-magnet 90 is made through the On thecontact 4 passing ver contact 15, circuit '17 3 is closed, and .thentact device B is thereupon rotated as many teeth as there are uncoveredcontacts remaining in the group 15 (in this case eight teeth), wherebythis contact device is brought back to its zero position. After eachfurther actuation of the contact device A by one tooth, that is the eihth (168, contact 95) the ninth (.169, 96) an the tenth I 170, 97 theother contact devices are rotate one after theother, C six teeth, D fiveteeth, and E two teeth, and thus are brought into their zero positions.In Fig. 23 these zero positions are indicated by dot and dash lines.When the arm comes to a stand over the first of the contacts 19, thecontact device'A is rotatedby the eleventh tooth (171), wherebyconnection is made with circuit 184, thecurrent in which circulates,from' the battery 157 through the electro-magnet 105, contacts 155 aand 154, and contact 103 in the-contact device A. Therebythe hook 153 israised out of the tooth of the contact rod andthe latter ,is returned toits normal position by the spring 185. On the .further movement of thearm 3 over the second of the contacts 19,

the contact device A. is rotated anothertooth, the twelfth. (I72)."Hereby the circuit 185 is closed, the current in which circulates fromthe battery through the electromagnet 81, contacts 101, 85, and 110, andcontacts 116 by the electro-magnet 113, whereby: the, electro-magnet 81attracts the lever "73. and the levers 71 and 72. return to app 3 in itsfurther movement.

- pressed agalnst their original position. At the same time thecircuit-186 is closed by the contacts -77, 80, coming together, thecircuit circulates from the battery through the contacts 59, 67 bythe-lever mechanism of the exchange call-apparatus,the electromagnet70,00ntacts 49 and 46 on said apparatus, and contacts 77, 80 by thelever mechanism of the connecting-up apparatus, Hereby the lever 69 isdisplaced, setting free the levers 61 and 54, which return to theiroriginal positions. On the contact 20, the subscribers callappae ratusisbrought to a standstill by the stop 31. In this way all theapparatuses are brought back into their original positions.

All the contacts 48, 49, 50, etc., of the first exchange apparatusare-connected up current in which the arm 3 arriving at. I

with the like contacts '48, 49, etc., von thesecondand on all the othersin order, so that the currents sent from the call-apparatuses of all theother subscribers flow through the said .connection to the (first)exchangecall apparatus, which has the described connection with all theconnectingup apparatuses, and from here to the disengaged connecting-upapparatuses, which in like manner are sought out by means of therelative exchange apparatus.

Adjacent tothe lever 54 by each apparatus, is actuated by the currentinthe-electromagnet 188. This is provided in case the contacts 46. of, twoor more exchange call apparatuses should simultaneously or almostcontacts 48 which, asalready explained cor-. respond to one and the sameconnecting-up aratus. In thiscase the circuit 189 or 190, (Fig. 28) willbe closed, the current in which flows through the electro-magnet 188 bythe exchange apparatus referred to, so that only that lever 54, theelectro-magn'et 53 of which is first. energized is actuated The lever187 of this apparatus is thereupon the lever 54, while the other. levers54, the electro-magnet of which may have been energized-an instantlater81'6' prevented from moving owing to this actuation of the lever 187.

Having now. fully described my said invention' what I claim and desireto secure by Letters Patent is a v 1. An automatic telephonesystemjicomprising subscribers call mechanism,

of line connecting-up apparatus'atthe exchange,

under control ofthecall mechanism, the latter acting automatically whenset forthe called number and released to thus control uninterruptedlythe said selection .and also the operation of the lineconnecting-upapexchange is aknee-shaped lever 187 which indi vidualselective apparatus and a plurality simultaneously come to astandstlllover the v v the individual selective apparatus being-adaptedto select automatically an idle or disengaged line connecting-upapparatus of said device, with adjustable shields for (topics ofparatus, contact and lever mechanism one each for the individual andconnecting-up apparatus, and a test and control circuit governed.thereby so that it is normally 2. In an automatic telephone system, ex-

change apparatus comprising individual selective apparatus and aplurality of line connectingup apparatus, the latter having numeralselecting devices and acontrol device therefor, in combination with asubscribers call-mechanism having a rotatable arm carrying contacts, andfixed contacts cooperating therewith and arranged in groups, one groupcontrolling actuation of-the individual apparatus to cause selection ofan idle coiinecting-up apparatus, 0 rtain other groups being in pairsthe first o a pair controlling the actuation of a numeraljselectingdevice, and the second the return fwnormal covering a portion of thefirst and exposing a like portion of the second of such paired groups,and an auxiliary contact for eachgroup controlling the said controldevice;

3 'Inan automatic telephone system, subscribers call-mechanism andexchange mechanism, comprising individual selective apparatus and aplurality of line connectingup apparatus, the individual apparatusundersubscribers control being adapted to select an idle connecting-upapparatus, the latter comprising slidable contact rods whereon appearthe terminals of subscribers lines grouped numerically by therespective. rods, terminals for cooperating therewith and likewisearranged, like fixed terminals of the respective-groups being joined,contact devices for selecting the desired tenninal comprising fixedcontacts androtatable disks under subscribers control, one such' devicecontrolling the others, certain of said others having their fixedcontacts connected to said joined terminals, and certain'otherscontrolling the selection and actuation of a rod, and electro-magneticactuating means 02 tlie contact device and rods.

anism, comprising individual selective apparatus and a plurality of lineconnectingn an automatic telephone system, sub scribers call-mechanismand exchange mech "to said joined terminals,

up apparatus,

lect-an idle connecting-up apparatus, the latter comprising slidablecontact rods Whereon appear the terminals of subscribers lines groupednumerically by the respective rods,

fixed terminals for cooperating therewith" 60 and likewise arranged,like fixed terminals of the respective groups being joined, contactdevices forselecting the desired terminal comprising fixed contacts androtatable disks under subscribers control, one such device controllingthe others, certain of "said othershaving their fixed contacts connectedand certain others controlling the selection and actuation of a rod, andelectro-magnetic actuating means for the contact device and rods,together withrneans for preventing the actuation of a selected rod ifthe subscribers line selected be busy in another connection.

In an automatic telephone system, sub-:

scribers call-mechanism and exchange mechanism, comprising individualselective-ap paratus and a plurality of line connectingup apparatus, theindividual apparatus under subscribers control being adapted to sci-feelect an idle connecting-up apparatus, the latter comprising slidablecontact rods whereon appear the terminals of subscribers lines groupednumerically-by the respective rods,

fixed terminals for coiiperating therewith and likewise arranged, likefixed terminals of-the respective groups being joined, contact devicesfor selecting the desired terminal comprising fixed contacts androtatable disks under subscribers control, one such device controllingthe others, certain of said others having their fixed contacts connectedto said joined terminals, and certain others controlling the selectionand actuation of a rod, and 'electro-magnetic aetuat-ing' mcans,

for the contact device and rods, together with means whereby when thesubscriber restores his receiver, the call-mechanism is enabled to causethe exchange devices brought into use to be returnedto normal condition.

In testimony whereof I have hereunto set my hand in presence of twowitnesses.

. JOSEF PETICKY. Witnesses:

FRANCIS K. SUoHncNnKE. J osnr POKORY.

this patent may be obtained for five cents each, by addressing' the"Commissioner oi Iatento,

the individual apparatus un- I der subscribers control being adapted tose '55

